Methylthioninium chloride, a chemical compound forming a blue solution when dissolved in water. Has a range of applications but used in aquaria as an antifungal, antibacterial, and anitparasitic agent.

Vernacular name for the tiny freshwater crab Limnopilos naiyanetri Chuang and Ng 1991, a member of the family Hymenosomatidae, or false spider crabs. It’s native to Nakhon Pathom province, southern central Thailand and its body achieves a maximum diameter of around 1 cm. Completely aquatic and apparently spends its entire life cycle in fresh water.

Section of DNA comprising very short nucleotide sequences repeated many times. Highly polymorphic and used as a marker to determine genetic diversity, identify important genetic traits, analyse relationships, etc..